Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[68] These confessions agreed with what his sister had told him, and tended greatly to corroborate her testimony, and to free her from the suspicion of her unfaithfulness to him. So the king having satisfied himself of the spite which Doris, Antipater's mother, as well as himself, bore to him, took away from her all her fine ornaments, which were worth many talents, and then sent her away, and entered into friendship with Pheroras's women. But he who most of all irritated the king against his son was one Antipater, the procurator of Antipater the king's son, who, when he was tortured, among other things, said that Antipater had prepared a deadly potion, and given it to Pheroras, with his desire that he would give it to his father during his absence, and when he was too remote to have the least suspicion cast upon him thereto relating; that Antiphilus, one of Antipater's friends, brought that potion out of Egypt; and that it was sent to Pheroras by Thendion, the brother of the mother of Antipater, the king's son, and by that means came to Pheroras's wife, her husband having given it her to keep. And when the king asked her about it, she confessed it; and as she was running to fetch it, she threw herself down from the house-top; yet did she not kill herself, because she fell upon her feet; by which means, when the king had comforted her, and had promised her and her domestics pardon, upon condition of their concealing nothing of the truth from him, but had threatened her with the utmost miseries if she proved ungrateful [and concealed any thing]: so she promised, and swore that she would speak out every thing, and tell after what manner every thing was done; and said what many took to be entirely true, that the potion was brought out of Egypt by Antiphilus; and that his brother, who was a physician, had procured it; and that when Thendion brought it us, she kept it upon Pheroras's committing it to her; and that it was prepared by Antipater for thee. When, therefore, Pheroras was fallen sick, and thou camest to him and tookest care of him, and when he saw the kindness thou hadst for him, his mind was overborne thereby. So he called me to him, and said to me, "O woman! Antipater hath circumvented me in this affair of his father and my brother, by persuading me to have a murderous intention to him, and procuring a potion to be subservient thereto; do thou, therefore, go and fetch my potion, (since my brother appears to have still the same virtuous disposition towards me which he had formerly, and I do not expect to live long myself, and that I may not defile my forefathers by the murder of a brother,) and burn it before my face:' that accordingly she immediately brought it, and did as her husband bade her; and that she burnt the greatest part of the potion; but that a little of it was left, that if the king, after Pheroras's death, should treat her ill, she might poison herself, and thereby get clear of her miseries." Upon her saying thus, she brought out the potion, and the box in which it was, before them all. Nay, there was another brother of Antiphilus, and his mother also, who, by the extremity of pain and torture, confessed the same things, and owned the box [to be that which had been brought out of Egypt]. The high priest's daughter also, who was the king's wife, was accused to have been conscious of all this, and had resolved to conceal it; for which reason Herod divorced her, and blotted her son out of his testament, wherein he had been mentioned as one that was to reign after him; and he took the high priesthood away from his father-in-law, Simeon the son of Boethus, and appointed Matthias the son of Theophilus, who was born at Jerusalem, to be high priest in his room.